PENGARUH PUPUK NITROGEN TERHADAP INFEKSI Coryespora cassiicola (Berk & Curt) Wei PADA DAUN KARET DI PEMBIBITAN

Damiri, Nurhayati and Suparman, Suparman and Sofariani, Desty (2006) PENGARUH PUPUK NITROGEN TERHADAP INFEKSI Coryespora cassiicola (Berk & Curt) Wei PADA DAUN KARET DI PEMBIBITAN. In: in prosiding seminar nasional Pengelolaan OPT yang berwawasan Lingkungan dalam Mendukung Provinsi Sumatera Selatan sebagai Lumbung Pangan Nasional. Program Pasca Sarjana Universitas Sriwijaya, Palembang, pp. 131-142.

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      Abstract

      The objective of this research was to figure out the effects of nitrogen fertilizer on the infection of C. cassiicola (Berk &Curt) Wei, the causal agent of leaf fall disease of rubber ( Hevea brasiliensis Muell. Arg.). The research was conducted in greenhouse and hytopathological laboratory of the Department of Plant Pests ad Disease, Faculty of Agriculture, Sriwjaya University, from September to November 2005. The experiment was arranged in Completely Randomized Design with six treatments and five replications. The treatment were A (control, 0 g nitrogen each plant), treatment B ( 2 g nitrogen each plant), treatment C ( 4 g nitrogen each plant), treatment D ( 6 g nitrogen each plant), treatment E (82 g nitrogen each plant), treatment F ( 10 g nitrogen each plant). Pathogen inoculation was done by spraying spore suspension at spore density of 4 x 104 spore/ml. The spore used were harvested from C. cassiicola (Berk &Curt) Wei cultured on sterile rubber leaves. The parameters observed were incubation period, disease intensity, leaf spot area and latent period. The results showed that nitrogen fertilizer did not significantly affect incubation period but high-significantly affected disease intensity and significantly affected leaf spot area. The incubation period of C. cassiicola (Berk &Curt) Wei averagely ranged from 17.8 to 21.2 days. The disease intensity averagely ranged from 19.78 t0 45.97 percents and lesion area averagely ranged from 0.168 to 1.267 cm2. The observation in the greenhouse showed that the best nitrogen fertilizer to suppres leaf fall disease caused by C. cassiicola (Berk &Curt) Wei was 6 grams nitrogen fertilizaer per nursery plant.

      Item Type: Book Section
      Uncontrolled Keywords: Nitrogen fertilizer, Corynespora cassiicola, nursery rubber
      Subjects: S Agriculture > S Agriculture (General)
      Divisions: Faculty of Agriculture > Department of Plant Pests and Diseases
      Depositing User: Dr. Nurhayati Damiri
      Date Deposited: 25 Jun 2012 23:26
      Last Modified: 11 Sep 2012 00:16
      URI: http://eprints.unsri.ac.id/id/eprint/1064

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